Issues with bash scripting syntax in Jenkins pipeline

Question

I want to perform the following script:

sh """#!/bin/bash -xe
source ${rcfile}
serverName=$(openstack server list --name openstack-cluster-smoketest-${env.BUILD_NUMBER}-${hostname})
count=0
limit=6
while [ ! -z $serverName || $count -gt $limit ]
do 
  openstack server delete openstack-cluster-smoketest-${env.BUILD_NUMBER}-${hostname}
  count=$((count + 1))
  sleep 10s
  serverName=$(openstack server list --name openstack-cluster-smoketest-${env.BUILD_NUMBER}-${hostname})
done
if [ $count -eq $limit ]; then
  exit 1
fi
"""

Thanks in advance!

I tried using single quoted & doubly quoted and I understand for string interpolation you need doubly quotes

I know my rcfile sourcing works perfectly, as I ran this before and it works fine in a different shell block:

sh """#!/bin/bash -xe
source ${rcfile}
openstack server delete openstack-cluster-smoketest-${env.BUILD_NUMBER}-${hostname}
"""

Also running this portion alone works in a shell block after souring and creating an instance with the name openstack-cluster-smoketest-${env.BUILD_NUMBER}-${hostname} that pulls in the build number and current hostname succesfully (I am pulling in the build_number & hostname from a jenkins pipeline stage)

sh """#!/bin/bash -xe
source ${rcfile}
openstack server list --name openstack-cluster-smoketest-${env.BUILD_NUMBER}-${hostname}
"""

Answer 1

As a habit, always paste your code into ShellCheck.net first. It will save you time and embarrassment more often than not.

Short answer - use [[ instead of [.

$: declare -i count=0 limit=3
$: while [[ -n "$serverName" ]] && (( count++ < limit )); do echo $count; done
1
2
3

or maybe

$: declare -i count=0 limit=3; while [[ -n "$serverName" && $count -lt $limit ]]; do echo $((++count)); done
1
2
3